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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Využití kavitace v technické praxi / Cavitation in engineering praktice

Kianička, Martin January 2010 (has links)
This diploma thesis contains three parts. The first part is a background research which deals with notions such as cavitation and cyanobacteria. It also contains current phase in the use of cavitation. The second part deals with design, composition and constructional solution of hydraulic circuit on the riverboat. The third part deals with experimental certification of the cavitation effect on the cyanobacteria in the water. Design of the riverboat with the hydraulic circuit including the circuit itself and the cavitation tube was created in SolidWorks program, calculations, it’s processing and graphs were created in Microsoft Excel.
22

Alternativy řešení plošinového zvedáku / Solution alternatives of lifting platform

Hájek, Ondřej January 2010 (has links)
The aim of this thesis is to analyze the possibility of mechanical design platform lifts. Proposal lifting platform with mechanical and hydraulic drive with a capacity of 3500 kg and lift 600 mm. The work is mainly focused on design and strength calculation mechanism and structure. Proposal hydraulic circuits and the development drawings for both types of drive.
23

Teoretické řešení pneumobilu / Theory of pneumatic car design

Stodolák, Martin January 2011 (has links)
This thesis covers the theoretical solution of the compressed air powered vehicle. The first section describes the competition of the compressed air powered vehicles, that is annually held in Hungary, where the idea for such a car design was created. There are also additional descriptions of the construction of the machines from the hungarian competition. In the second section there is a calculation of the chosen vehicle construction, where the main emphases is based on the calculation of the drive of the vehicle. The description of the manufacturing, tests and vehicle presentation follows.
24

Návrh testovacího standu pro stanovení provozních parametrů magnetického hřídelového těsnění / Design of Testing Bench for Determination of the Operating Parameters of the Magnetic Shaft Sealing

Kubík, Michal January 2013 (has links)
This thesis deals with design of testing stand for operating parameters magnetic seal. In this thesis was done analysis of construction magnetic circuit and analysis of operating parameters. This work contains FEM analysis of magnetic circuit and experimental tune up. The results of this analysis will be used for design magnetic circuit and geometric sensitivity analysis in test stand.
25

Návrh mikropojezdu pro harvestor H 40 / Design of micro drive for harvester

Jonák, Vojtěch January 2014 (has links)
This master thesis deals with design of hydrostatic drive for harvester. It contains calculations of parameters from current drive like speed, hydraulic losses and tractive effort. Because now these parameters are insufficient in next part of work is proposed few options how to achieve required parameters. In selected cases are made calculations and based on the results are recommended two options for realization.
26

Křížení v kartézském genetickém programování / Crossover in Cartesian Genetic Programming

Vácha, Petr January 2012 (has links)
Optimization of digital circuits still attracts much attention not only of researchers but mainly chip producers. One of new the methods for the optimization of digital circuits is cartesian genetic programming. This Master's thesis describes a new crossover operator and its implementation for cartesian genetic programming. Experimental evaluation was performed in the task of three-bit multiplier and five-bit parity circuit design.
27

Nositelná rektifikační anténa pro RF sklízení energie / Wearable rectifying antenna for RF energy harvesting

Kokolia, Martin January 2016 (has links)
The aim of this thesis is to design and rectena that would be able to integrate into a cloth thanks to use of textile substrate. The first part deals with the possibilities of using various communication channels and services for maximizing the useable power. Attention is focused mainly on the use of textile materials for implementing microstrip circuits. It is made valorization of all the typical characteristics and problems using different fabrics as a microwave substrate and the possibilities of realization of conductive structures of microwave patch antenna and microstrip circuits. At the second part are identified parameters and constraints used for the design of the overall device with a rectifying antenna, which will be after the verification of the function in real implementation used for the final concept using textile structures. The design is verified by simulations by CST Microwave Studio and Microwave Designer. The initial design is being gradually extended by other concepts, the use of other materials and technologies. Several design are made, their properties evaluated and the best ones are then compared based on real measurements.
28

Třífázový síťový napaječ s aktivním usměrňovačem / Three Phase Line Active Rectifier

Miko, Radoslav January 2016 (has links)
Diploma thesis deals with problems of power factor correction and total harmonic distortion of line current in three phase industrial power supplies. It focuses mainly on using of single phase active PFC topologies based on the principle of step up converter, which are applicable to three phase systems. Verification of operation and comparison of parameters of several circuits was done by simulation in program Matlab Simulink. Then for selected circuit of active PFC was done complete design. The result is a prototype of single phase active PFC circuit with an output power 2 kW for input voltage range from 180 to 528 V (47 – 63 Hz) and a prototype of three phase active PFC circuit with an output power 6 kW for input voltage range from 3 x 180 to 3 x 528 V (47 – 63 Hz).
29

Dopady společné zemědělské politiky na stav a možný vývoj venkova na území obce s rozšířenou působností Uherský Brod

Křeháčková, Barbora January 2019 (has links)
The aim of submitted thesis is to evaluate impacts and influence of the Common Agricultural Policy od European Union on the current stadium and development of agriculture and countryside of the municipality with extended competence Uherský Brod. The firt part is about history of the Common Agricultural Policy, its instruments, finance and curent state of agricultural in the Czech Republic. The second part is about selected area, their physical geography and socio economic charakteristic. The thesis also analyses the evolution of the land use in the studied area, especially after 2000. The focus is set on the development of the agricultural and countryside aspects of the studied area after the Czech Republic entrance into the European Union. Then the thesis analyses financial supply from European Union to the studied area and to all Czech Republic. The thesis is based on questionnaires from small farmers, SWOT analysis of rural development in SO ORP area of Uherský Brod.
30

Sociodemografická analýza SO ORP Bučovice

Novotná, Martina January 2017 (has links)
The aim of this thesis was sociodemographic analysis of administrative district ORP Bučovice in the period 2005-2015. The first part of this thesis was dealt with description of the demographic analysis and demographic indicators. The second part devoted to the characteristics of the administrative district, civic amenities, further there were analysis of the pointers like natality, abortion, mortality, marriage, divorce rate and the migration. For these indicators, the development trend was projected for 2018 with the help of trending function. The analysis has shown that there is demographic aging in the administrative district and there is also a higher level of education of these population. At the conclusion of this thesis, a cluster analysis was carried out of all municipalities in the administrative district, which divided the municipalities into the clusters.

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